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Two green DDR5 RDIMM modules with gold contacts and black chips, no heat spreader

NEMIX RAM

NEMIX RAM 128GB (2x64GB) DDR5 4800 CL40 ECC RDIMM ThinkMate memory upgrade

SKU CH-GDWZ-VQEBS

128 GB DDR5 ECC registered server memory kit with two 64 GB modules at 4800 MT/s and CL40 latency for ThinkMate rackmount systems

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB capacity with two 64 GB modules
  • DDR5 4800 speed rated at PC5-38400
  • ECC registered design for data integrity
  • CL40 latency at 1.1 V operation
  • Validated for ThinkMate RAX-XS4-21S4 server

128 GB DDR5 ECC RDIMM kit

This 128 GB kit contains two 64 GB DDR5 4800 registered DIMMs with ECC and a CL40 latency. It is built for ThinkMate RAX-XS4-21S4 rackmount servers that require registered memory with error correction.

Installation notes

The modules use the standard 288-pin DDR5 RDIMM form factor and operate at 1.1 V, so they seat in the server’s memory slots without adapters. The main risk is mixing registered DIMMs with unbuffered memory or populating slots in an order the system board does not support, which will prevent the server from posting.

DDR5 4800 registered limits

The DDR5 4800 interface caps the data rate at 4800 MT/s and the registered design adds one clock cycle of command buffering, which slightly increases latency compared with unbuffered modules. The CL40 timing and 1.1 V voltage are fixed by the JEDEC standard for this speed grade, so the kit cannot run at higher frequencies or lower latencies without leaving specification.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $3,290.99
Pricier than about 74% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $25.71 per GB
Pricier than about 70% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineTHINKMATE Server/Workstation Compatible Series Memory
Model nameTHINKMATE DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-924K2
Total capacity128 GB (2 × 64 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank2Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsTHINKMATE
In the box
Included items128 GB (2 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How do I verify the 128GB DDR5 4800 kit is running at CL40 after installation?

Enter the server BIOS or UEFI and confirm the memory frequency shows 4800 MT/s with CAS latency 40; the ECC status should also report as active for each 64GB module.

What comes in the box and do I need extra parts for the ThinkMate RAX-XS4-21S4?

The kit includes two 64GB 288-pin DDR5 RDIMMs; no additional memory components are required for the listed ThinkMate rackmount server.

Which capacity version should I choose for a dual-channel ThinkMate server needing 128GB total?

Select the 2 x 64GB kit (part MR38400-924K2) to populate two channels with 128GB of registered ECC DDR5 at 1.1V.

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